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Why did some scientists oppose the development of the hydrogen bomb?

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nuclear strategy The explosion from the first thermonuclear weapon (hydrogen bomb), code-named Mike, which was detonated at Enewetak atoll in the Marshall Islands, November 1, 1952. The photograph was taken at an altitude of 3,600 metres (12,000 feet) 80 km (50 miles) from the detonation site.

Following the Soviet Union's first atomic test in 1949, an intense debate emerged regarding the development of the hydrogen bomb. Many scientists, most notably those on the General Advisory Committee (GAC) of the Atomic Energy Commission chaired by J. Robert Oppenheimer, strongly opposed the project based on profound moral and humanitarian concerns.12

The opposition was rooted in the belief that the extreme dangers inherent in such a weapon outweighed any potential military advantages. Critics argued that a "super bomb" could become a weapon of genocide and that its immense, limitless destructive power made its very existence a danger to humanity as a whole. Some scientists characterized the weapon as an "evil thing" that should never be produced.1

Despite these principled objections, the Joint Chiefs of Staff and other major government bodies recommended proceeding with the program. President Harry S. Truman ultimately authorized the development of the hydrogen bomb in January 1950, prioritizing national security and the ongoing Cold War arms race.13